Aspire has always been the leader in Mouth to Lung devices, and the Nautilus was the front runner of their designs. The Nautilus 2 is an improvement on the already great Nautilus series. With a streamlined design, metal casing for the glass, and a new top fill design, Aspire is pushing the limits for mouth to lung vapers. They have also updated the airflow from the 5 individual holes to a dial, this allows you to be more specific with your airflow settings which allows for a better hit every time. The Nautilus 2 also is a more compact model than the original Nautilus which helps improve the flavor production. It is also backwards compatible with Nautilus coils as well as the new 0.7Ω coils. Most 510 drip tips will fit on this tank, furthering the customization of your draw. Pair this tank up with a compact battery and you'll have a great Mouth To Lung vape to use all day.